Nature
New European Breeding Bird Atlas
DDA | Dachverband Deutscher Avifaunisten
Ornitho Switzerland
Xeno-Canto | Birdsongs worldwide
Featherbase
AG Eulen | Arbeitsgemeinschaft Eulenschutz
Gulls to the Horizon | Ornithological Blog
Birdlife Switzerland
Aboriginal Journeys | Whale Watching Tours (BC)
Paws Trails Explorers | Online Magazine
Museum.BL | Nature and History Switzerland